KR101680973B1

KR101680973B1 - Chair of Move Back

Info

Publication number: KR101680973B1
Application number: KR1020150086998A
Authority: KR
Inventors: 박영호
Original assignee: 박영호
Priority date: 2015-06-18
Filing date: 2015-06-18
Publication date: 2016-11-29

Abstract

A chair with a movable backrest comprises: a guide shaft (10) fixed to a chair seat or a chair frame in the front and rear direction of the seat; and a mover coupled to the guide shaft to move in the front and rear direction of the chair. The left and right lower portions of a backrest structure (2) for supporting a back plate (1) of a backrest are coupled to the mover. The guide shaft (10) has saw teeth, and the mover also has saw teeth engaged with the saw teeth of the guide shaft. The backrest coupled to the mover is inclined forward or backward to engage or disengage the saw teeth formed on the guide shape and the mover, thereby controlling the forward and backward movement of the backrest.

Description

{Chair of Move Back}

The present invention relates to a chair in which a backrest is shifted forward and backward so that a worker sitting on a chair can tilt his or her posture forward or backward, or move back and forth around a chair seat and sit comfortably.

Japanese utility model application publication no. 45-20210 (filed on July 22, 1966) shows the first prior art that is configured to move the backrest. This way, when the back is up and down, but when you are backing up, you have to lean against your back to get your butt off the seat. It can not sit because it is off the seat. I can not write at all.

Thereafter, a method of making the U-shaped bottom of the back of the back, such as KR 20-0448295, was filed as an improved method. However, this method can not be practically used because it becomes a strange form with protrusions at the rear of the chair. A method of installing a guide rail on both sides of the seat so as not to protrude rearward has been proposed as in JPA_1999113674 and has become mainstream.

On the other hand, in a method of fixing the movement of the backrest, various methods for pinning and fixing the pins have been filed. JPA_1999113674 suggests a method in which the backrest does not protrude rearward. However, this also mentions that the backrest can be fixed by pin-fitting without any specific configuration. The patent is a function of locking the backrest received.

In the following, a fixing method in which a pin is fixed by the same method as that shown in KR 20-0448295 in Korea is a fixed method.

That is, in the history of the invention in which the backrest moves back and forth, the backrest is configured to protrude rearward, and the backrest moves to both sides of the seat.

At this time, the method of fixing the moving back is a method of fixing the pin by fixing the pin, which is a reliable method in that it can secure the certainty of fixation. However, inserting a pin into a discontinuously spaced hole requires adjustment, and a clicking sound is inevitable when connecting and disconnecting. In addition, the positions where the pins are inserted are provided on the left and right sides, respectively, or on both sides.

If the fixing pin is configured only on either the left or right side, there is a phenomenon that the unfixed side is pushed when the backrest is tilted. However, it is very annoying to install it on both sides and operate each.

In order to remedy these inconveniences, I have made a series of inventions such as 10-1103154 and 10-1092785, 10-1243018 and so on. This is basically a fixed method using friction. It is thought that by adjusting the roughness of the surface, sufficient fixing force can be obtained even with a small force. A cam or screw was used as a means of actuating the clamping force, and a contact pad was interposed to adjust the contact surface to reduce wear. However, in the case of assuming frequent movement and fixation in the process of producing the prototype, abrasion of the cam or screw used as the connection and disconnection mechanism to obtain the friction and abrasion of the contact surface were serious.

Thus, the present invention provides an invention which is easy to fix and does not have a problem such as abrasion.

When studying or studying in front of a desk, the worker approaches the upper part of the workbench, and the back of the chair falls off the back of the worker. Therefore, the worker who is not supported by the backrest becomes unstable and fatigued over time. Although attempts have been made to cope with such a situation as mentioned above, there has been no practicality due to incomplete use and inconvenience in practical use. Overcoming these shortcomings, I have invented a series of inventions.

However, it was considered that there was difficulty in ensuring sufficient durability due to the worn parts used in the preceding invention of the prototype during the manufacturing process. Therefore, it is desirable to invent a method that can escape the problem of abrasion inherently while maintaining convenience and certain certainty.

The guide shaft 10 is fixed to the seat back or the chair frame in the front-back direction with respect to the seat. The chair includes a chair back which is movable in the front-back direction of the chair, including a mover which is coupled to the guide shaft and moves in the front-back direction of the chair.

The left and right lower portions of the backrest structure 2 for supporting the back plate 1 of the backrest are coupled to the mover and the shape of the teeth is formed on the guide shaft 10 and the mover 6 can be engaged with the teeth So that the inclination of the backrest coupled to the mover can be tilted forward or backward so that the guide shaft and the mover can be engaged or separated to control the movement of the backrest in the forward and backward directions.

The mover 6 engaged with the guide shaft 10 forms a shaft hole for tilting the backrest back and forth with respect to the guide shaft 10. The mover 6 forms a sawtooth shape formed at the lower portion of the guide shaft 10, The sawtooth configuration of the mover 6 is combined when the backrest is inclined backward to limit the backward movement of the backrest; So that the backrest can be moved back and forth along the guide shaft 10 when the backrest is tilted forward.

One method of constructing the mover 6 is to divide the mover 6 into an inner mover 6a and an outer mover 6b so as to be relatively rotatable. The inner mover 6a on the inner side is coupled to move back and forth along the guide shaft 10 and the outer mover 6b on the outer side of the mover is coupled to the backrest structure 2. [

The saw tooth configuration of the outer mover combines with the saw tooth shape formed on the guide shaft 10 when the backrest is inclined backward to limit the rearward movement of the mover; When the backrest is tilted forward, the sawtooth shape formed on the mover is separated from the sawtooth shape of the guide shaft 10 so that the mover can move forward and backward.

Fixation of the backrest movement is achieved by engaging a saw tooth formed on the guide shaft 10, which is a fixed portion, with a saw tooth formed on the mover 6 included in the movable back. The action of engaging them is combined by tilting the backrest back, and their release is done by slightly tilting the backrest forward.

When the saw tooth shape formed on the mover is combined with the shape of the teeth formed on the guide shaft 10 by the inclination of the backrest, the joint is temporarily engaged over the entire saw tooth shape, . Therefore, the risk of breakage is greatly reduced.

These operations are fundamentally able to solve the problem of wear in the prior art by eliminating friction parts. Therefore, the problem of durability due to abrasion is solved.

In addition, compared with my prior art, the components to be operated can be minimized, so that the configuration is simple, and therefore, it is economically advantageous.

Figure 1: A perspective view of a backrest chair including inclined front and rear inclined mating apertures
2: a rear perspective view of Fig. 1;
Figure 3: A perspective view of the right mover on the right side of Figure 1,
Fig. 4 is a cross-sectional view showing the engagement and disengagement of the saw tooth shape of the mover and the guide shaft;
Figure 5: A perspective view of a backrest chair comprising a rotating mover
6: Exploded view of rotating mover, stopper and guide shaft configuration
7: forward tilting state of the backrest including the rotating mover

The present invention will now be described in detail with reference to the accompanying drawings.

1 to 4 show an example of a movable backrest. The mover 6 of these examples is formed such that the through hole of the mover coupled to the guide shaft 10 can be inclined forward and backward of the backrest.

1 and 2 show a state in which a guide shaft 10 is fixed to a body of a seat or a chair so that the backrest can be moved back and forth and a mover 6 which is coupled to the guide shaft 10 and moves .

Fig. 3 shows the right mover 6 constructed on the right side of Fig. 1 chair. It is seen that a serrated shape is formed below the through hole through which the guide shaft 10 passes.

Fig. 4 is a cross-sectional view showing the backrest structure 2 of Fig. 1, the mover 6 coupled thereto, and the guide shaft 10 coupled to the mover.

5 to 7 illustrate an example in which the mover 6 is divided into an inner mover 6a and an outer mover 6b so as to be rotatable relative to each other.

A stopper 19 is formed on the front surface of the outer mover 6b so as to engage with a saw tooth shape formed at the lower end of the guide shaft 10. In FIG. 5, such a sawtooth shape is combined with a sawtooth formed on the guide shaft 10, and the backrest is fixed and can not move.

6 shows a state in which the inner mover 6a and the outer mover 6b are rotatably engaged and the guide shaft 10 is coupled to the inner mover 6a and the stopper 19 is coupled to the outer mover 6b Fig.

7 shows a state in which the backrest slightly rotates forward and the saw tooth formed on the guide shaft 10 and the saw tooth formed on the stopper 19 are separated from each other to allow the backrest to move forward and backward.

The backrest includes a back plate (1) for contacting the user's body and a back structure (2) for supporting the back plate. The back plate (1) of the chair is coupled to the backrest structure (2) supporting the back plate (1).

The guide shaft 10 is fixed to the seat 15 or the chair frame, which is a fixed part of the chair, in the front-back direction of the chair. The guide shaft 10 is coupled with a mover 6 which is coupled with the guide shaft 10 and is movable in the front and rear direction of the chair.

The lower ends of the backrest structure 2 are engaged with and supported by the mover 6.

A saw-tooth shape is formed in the lower portion of the guide shaft 10.

The mover 6 has a sawtooth shape that engages with a sawtooth formed on the guide shaft 10 when the backrest is rotated back and forth of the chair and tilted.

The position of the sawtooth shape formed on the guide shaft 10 can be formed at any portion of the guide shaft 10. [ However, there has been shown an example in which the problem of wear and aesthetics are formed in the lower part of the guide shaft 10 as shown in the above-mentioned drawings 1 to 7,

The shape of the guide shaft 10 is also a circular axis in the drawings of FIGS. 1 to 7, but may not be a square, a pentagon, a hexagon, or the like; In the above-described drawings, a through hole is formed in the mover 6, but a part of the mover may be joined to the guide shaft 10 by making a parser guide groove and matching the shape of the guide shaft 10. May be combined.

1, 2, 5, and 7, the guide shaft 10 is configured as a seat under one of the fixed objects, but it may be a fixed object even if it is not a seat. For example, it can be fixed to the chair frame below the seat.

In Figs. 1 to 2 and Figs. 4 to 7, the teeth are formed on the lower side of the guide shaft 10 and on the lower side of the through hole of the mover 6, but their positions may be formed on the upper side. Further, it is not necessary to form the saw tooth shape in the through hole of the mover 6, and it may be formed separately on the outer side of the through hole as shown in the configuration of Figs. 5 to 7. As an example of such a case, the stopper 19 formed on the outer side of the mover is shown in Figs. 5 to 7.

The shape of the teeth formed on the guide shaft 10 and the mover and engaged with each other may be a square shape, a shape that can be combined with a pentagon, a round shape, or the like, and the term "sawtooth shape"

As shown in Figs. 1 to 4, a structure in which the backrest is tilted and rotated to engage or separate a saw tooth formed on the mover 6 and a saw tooth formed on the guide shaft 10, 6 may be coupled to the guide shaft 10 as shown in FIG. 4 so that the backrest can be inclined slightly back and forth.

Alternatively, as shown in FIGS. 5 to 7, a mover is divided into an inner mover 6a and an outer mover 6b, and then the mover is rotatably coupled.

1, 2, 5, and 7, when the backrest is in contact with the fixed guide shaft 10 in a state in which the teeth of the mover 6 are in contact with each other, . In this state, the backrest is not pushed backward even if the chair user leans against the backrest and exerts a backward force on the backrest.

When the backrest is tilted toward the front of the chair, the toothed engagement between the guide shaft 10 and the mover 6 is released. In this state, the backrest can be moved back and forth to the chair to be positioned at a desired position.

In use, the user tilts so that the backrest, the mover 6, or the backrest structure 2 extends to the lower portion of the mover to project the mover and tilts to the front. In this state, the backrest is moved to the front and rear of the chair, There are two.

In Fig. 1, a handle is attached to the front of the right mover to assist the rotation and movement of the backrest as described above, but this is for convenience. The chair user can easily operate by holding the backrest structure 2 or the back plate 1 and tilting it back and forth without constructing such a handle.

When the tooth shape formed on the mover 6 and the shape of the teeth formed on the guide shaft 10 are combined by such front and back tilting, the coupling is temporarily engaged over the whole tooth shape, It acts effectively against external force.

The center of gravity of the backrest is located behind the point at which the backrest and the mover 6 are engaged, so that the backrest can always be tilted backward. Alternatively, although not shown in the figure, the mover 6 may be inclined rearward to constitute an elastic element acting on the mover 6 to engage with a saw tooth formed on the guide shaft 10. As one such example, it is possible to constitute an elastic plate spring, a compression spring, or the like in front of the mover to press the guide shaft 10. At this time, in order to reduce the friction, it is also possible to constitute a wheel at the portion where the guide shaft is pressed, so that the wheel presses the guide shaft. The elastic element may be constituted on one side or on both sides.

The backrest is restored back to its original position where the backrest is inclined backward by the restoring force of its own weight or the elastic body so that the mover 6 and the saw tooth shape of the guide shaft 10 are engaged with each other. As a result, the motion of the backrest is fixed again.

This operating state is shown in Fig. 4 as a sectional view.

The left side of FIG. 4 shows a state in which the saw tooth shape formed on the mover 6 and the saw tooth formed on the guide shaft 10 are engaged with each other so that the back and forth movement of the back is fixed.

In this state, when the chair user leans against the backrest, the backrest rotates to the back of the chair and receives a tilting force while applying a force to the back. The action of this force acts such that the saw tooth shape formed on the mover 6 is more strongly engaged with the saw tooth formed on the lower side of the guide shaft 10, and the backrest is fixed.

4 shows a state in which the sawtooth formed on the lower side of the mover 6 is separated from the sawtooth formed on the guide shaft 10 by slightly inclining the backrest structure 2 forward, .

The above-described chair according to the present invention can be variously modified and embodied within the scope of the claims, the detailed description of the invention and the attached drawings, and is within the scope of the present invention.

The configuration of the present invention is less neat because the shape of the external teeth is shown compared with the prior art of the present invention, and there is a possibility that there is jaggies or the saw tooth shape is damaged before the engagement of the teeth is completed. However, the structure of the present invention is simple in construction compared with the prior art of the present invention, and is free from the problem of durability that was worried about in the prior art since there is no part to be worn by being joined with each other.

Although the advantages and disadvantages of the respective products can be obtained, the present invention is added to the present invention because the worry of durability is reduced in the actual merchandising process, easiness of production and economical efficiency arise, and it is thought that it is more advantageous for actual product launch.

1: back plate 2: backrest structure
6: mover 6a: inner mover 6b: outer mover
8: Handle 10: Guide shaft
14: Support 15: Seat 16: (Up and down movement of the backrest) Stopper
18: Bracket 19: Stopper

Claims

A chair backrest which is movable in the front and rear direction of the chair, including a guide shaft 10 fixed to the seat back and fixed to the seat in a chair seat plate or a chair frame and a mover moving in the front- In the chair,
The left and right lower portions of the backrest structure 2 for supporting the back plate 1 of the backrest are coupled to the mover, and the guide shaft 10 is formed with a saw tooth shape, and the mover is provided with teeth The guide shaft 10 and the mover can be engaged or disengaged by inclining the inclination of the backrest coupled to the mover so that the back and forth movement of the backrest can be interrupted A backrest moving chair.

The mover 6 that engages with the guide shaft 10 forms a shaft hole so that the backrest can be inclined back and forth with respect to the guide shaft 10. The mover 6 has a serrated shape formed on the guide shaft 10, The saw tooth configuration on the mover may be combined to restrain the back movement of the back when the back is inclined backward; Wherein the backrest is separated from the backrest when the backrest is tilted forward so that the backrest can be moved back and forth along the guide shaft.

The inner mover 6a constitutes an inner mover 6a and an outer mover 6b that are relatively rotatably coupled and the inner mover 6a is movable along the guide shaft 10 in the front- , And the outer mover (6b) is coupled to the backrest structure (2); The saw tooth configuration of the outer mover combines with the saw tooth shape formed on the guide shaft 10 when the backrest is inclined backward to limit the rearward movement of the mover; Wherein when the backrest is tilted forward, the sawtooth shape formed on the mover is separated from the sawtooth shape of the guide shaft (10) so that the mover can move back and forth.